CN106053205B - A kind of self-balancing lever loading device and its application method - Google Patents

A kind of self-balancing lever loading device and its application method Download PDF

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Publication number
CN106053205B
CN106053205B CN201610331292.6A CN201610331292A CN106053205B CN 106053205 B CN106053205 B CN 106053205B CN 201610331292 A CN201610331292 A CN 201610331292A CN 106053205 B CN106053205 B CN 106053205B
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CN
China
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loading
lever
plate
self
load
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CN201610331292.6A
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Chinese (zh)
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CN106053205A (en
Inventor
吕伟华
张永兴
张文华
王海波
刘成
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南京林业大学
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Publication of CN106053205A publication Critical patent/CN106053205A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details

Abstract

The invention discloses a kind of self-balancing lever loading device and its application methods, including left column, right column, bottom plate, top plate, fixed frame, step-by-step toothed roller box, screw-driven slide bar, lever bracket, roller bearing, displacement sensor, LVDT displacement meters, poor level controller, weights, stepper motor, transmission rod pulley base, suspension rod pulley seat, pintle hook lock pin, hanger, load counterweight, integrated manipulator, transmission rod, lead power bulb, pressure sensor, load plate, pressure digital display instrument and computer, pass through the inverted displacement sensor in roller bearing bottom and poor level controller, stepper motor is controlled to be driven by computer, automatic leveling loads lever while vertical load is applied to model, and reach the measurement of load plate vertical displacement.The present invention realizes loading, and can apply the dead load of different role lever ratio with lift heavy loading counterweight, simple and practical, suitable for indoor model test, meets the loading condition in engineering practice.

Description

A kind of self-balancing lever loading device and its application method

Technical field

The present invention relates to a kind of civil engineering test equipment more particularly to a kind of self-balancing lever loading devices.This hair The bright application method for further relating to the self-balancing lever loading device.

Background technology

With continuous upgrading of the economic development to infrastructure demand, the safety of building structure is wanted with rational It asks and also increasingly improves, the Stability Judgement of structures in itself and realization theory is designed to current engineering under working environment The important step of construction.Therefore, to characterize structures full size or reduced scale physical experiments be Research foundation facility structure by One of the important means of power or deformation characteristic and key project demonstration or fundamental research is simple and effective method it One.How to be still a technical barrier to structures implementation state load during the development of experiment, existing equipment Technical merit is primarily present the following problem:(1) row is generally loaded into the larger weight stack of density and stacks loading, required load Heap loading substantial amounts when larger, safety are difficult to be effectively ensured, and loading procedure verticality is difficult to control;(2) it is another A kind of common load mode is to be loaded using servo-hydraulic or Pneumatic Transmission, but cost is partially expensive, is born beyond general Study Scope, and long-term loading effect is difficult to ensure that;(3) though traditional lever loading system can overcome preloading defect, after loading Phase excessively leads to the imbalance of load bar due to displacement, this influences the precision of test result very big.

Invention content

First technical problem to be solved by this invention is to provide a kind of can realize from using force and finely tunes flat, amplification load effect Should, and meet the self-balancing lever loading device of field of civil engineering indoor model test requirement.

Second technical problem to be solved by this invention is to provide the application method of the self-balancing lever loading device.

In order to solve above-mentioned first technical problem, self-balancing lever loading device provided by the invention, left column and Right column is mounted on bottom plate;Top plate is fixed on the left column and right column;The bottom plate is equipped with model slot, institute Load plate is equipped in the model slot stated;Fixed frame is built up in the side of the top plate, and step-by-step toothed roller box and stepper motor are fixed On the fixed frame;Screw-driven slide bar top is connected with the rotate gear in the step-by-step toothed roller box, described Step-by-step toothed roller box in drive gear connect with the stepping motor rotating shaft, the rotate gear and the sliding tooth Wheel engaged transmission, control system and the integrated manipulator of the stepper motor communicate to connect, and the fixed frame, which is equipped with, to be used In the LVDT displacement meters of the displacement of the detection screw-driven slide bar, the LVDT displacement meters and the integrated manipulator Communication connection;The lower part of the screw-driven slide bar is connect by roller bearing with lever bracket;Two displacement sensors are respectively provided at The two bottom sides of the roller bearing correspond to the lever bracket of the detection roller bearing both sides, and the displacement sensor passes through Poor level controller is communicated to connect with the integrated manipulator;Suspension rod pulley seat, transmission rod pulley base and weights are located at institute On the lever bracket stated and the suspension rod pulley seat, transmission rod pulley base are in the side of the roller bearing, the counterweight weight Code is in the opposite side of the roller bearing;Loading counterweight is hung over by hanger on the suspension rod pulley seat, the upper end of transmission rod Connect with the transmission rod pulley base, be equipped between the lower end of the transmission rod and the load plate and lead power bulb and pressure Force snesor, the pressure sensor are communicated to connect by pressure digital display instrument and the integrated manipulator;Described is integrated Controller is communicated to connect with computer.

Multiple pintle hook lock pins are provided on lever bracket, suspension rod pulley seat and transmission rod pulley base pass through pintle hook lock pin and lever bracket Positioning.

Whether top plate is equipped with the first level(l)ing bubble, placed in the middle by observing the first level(l)ing bubble during adjusting, to examine Test whether top plate reaches balance.

Top plate is fixedly clamped by flat nut on left column and right column.

Lever bracket is equipped with the guide rail moved convenient for transmission rod pulley base and suspension rod pulley seat, and pintle hook lock pin is not switched on situation Under be nested transmission rod pulley base and suspension rod pulley seat conveniently moving on lever bracket.

First pulley is installed, first pulley is moved along the guide rail on lever bracket, and transmission rod is slided on transmission rod pulley base Wheel seat conveniently moving.

Second pulley is installed, second pulley is moved along the guide rail on lever bracket, suspension rod pulley seat on suspension rod pulley seat Conveniently moving.

Whether lever bracket is equipped with the second level bubble, placed in the middle by observing the second level bubble during adjusting, comes Examine whether lever bracket reaches balance.

Load plate suqare is adjusted, and is adapted to different moulded dimensions.

In order to solve above-mentioned second technical problem, the side provided by the invention using self-balancing lever loading device Method includes the following steps:

1. adjustment disposes model test groove and loading device suitable for ceiling height:

Model slot is moved under device first before loading, is found most by rotating the flat nut on left column and right column Good bonding position, it is contemplated that the actual conditions of model test, height-adjustable ranging from 1.5~2.0m of top plate, according to first Level(l)ing bubble examines leveling between two parties, after leveling, flat nut is tightened fixed top plate, adjustment load plate center makes it to quasi-mode The model loading zone of type groove, coarse adjustment screw-driven slide bar makes lever bracket horizontal, and load plate is erected on model slot;

2. calibrate step-by-step system and leveling system:

Displacement sensor is opened, pressure sensor, LVDT displacement meters and poor level controller is opened, connects integrated manipulator, The first security protection preloading block on hanger, fine tuning lever bracket side weights have slight pressure to power bulb down force pressure sensor is led Value sensing, whether stepper motor driving leveling is normal under the conditions of examining roller bearing difference position;

3. setting lever ratio and load rank value, start to test:

Loading lever ratio is set according to magnitude of load, distributes and is loaded per level-one, by poor level controller, displacement sensor, LVDT displacement meters and stepper motor are connected to computer by integrated manipulator, and synchronous recording is realized by self-programmed software, according to Load step hierarchical loading, often experience roller bearing difference position, stepping leveling process in level-one load loading procedure, treat that pressure, displacement are surveyed Magnitude is stablized, and reminds and enters next stage loading, until off-test.

Using the self-balancing lever loading device and its application method of above-mentioned technical proposal, compared with prior art, tool It has the advantage that:

It is loaded by lever, can realize the load of 600kg, be adapted to different moulded dimensions, had good Compatibility, energy adjust automatically lever balance improve loading accuracy and effectively reduce test error, have good practicability.

The various load-up conditions of indoor model test can be easily realized using lever principle, and can be realized for a long time Hold lotus loading, overcome conventional heap and be loaded in scale and safety constraint, the stability of loading is ensure that, in engineering test With stronger flexibility, targetedly solves conventional lever in the loading later stage due to displacement excessive influence loading accuracy Problem.

Accessory is conventional mechanical accessory, and poor position control levelling function is easier to realize, a complete set of equipment is compared with servo hydraulic system In price there is larger advantage, experimentation cost is greatly saved, improves safety and the stability of experiment.

Description of the drawings

Fig. 1 is the structure diagram of the present invention;

Fig. 2 is the side structure schematic view of the present invention;

Fig. 3 is the overlooking the structure diagram of the present invention;

Fig. 4 is step gear box structure schematic diagram in Fig. 1;

Fig. 5 is transmission rod pulley base structure diagram in Fig. 1;

Fig. 6 is Fig. 1 middle hanger pulley base structure diagrams.

Label declaration:Left column 1, right column 2, bottom plate 3, top plate 4, fixed frame 5, gear-box 6, stepper motor 7, screw thread pass Moving slide-bar 8, lever bracket 9, roller bearing 10, weights 11, displacement sensor 12, poor level controller 13, transmission rod pulley base 14 are hung Bar pulley base 15, pintle hook lock pin 16 lead power bulb 17, and pressure sensor 18, load plate 19, hanger 20 loads counterweight 21, flat Nut 22, the second level bubble 23, integrated manipulator 24, computer 25, guide rail 26, LVDT displacement meters 27, pressure digital display instrument 28, Model slot 29, rotate gear 30, drive gear 31, first pulley 32, transmission rod 33, the first level(l)ing bubble 231,.Second pulley 321。

Specific embodiment

It is further explanation to the content of present invention rather than the protection of the limitation present invention below in conjunction with drawings and examples Range.

As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of self-balancing lever loading device, left column 1 and right column 2 are twisted admittedly On bottom plate 3;Top plate 4 is fixed on left column 1 and right column 2;Bottom plate 3 is equipped with model slot 29, is equipped with and carries in model slot 29 Lotus plate 19;Fixed frame 5 is built up in 4 left side of top plate, and step-by-step toothed roller box 6 and stepper motor 7 are fixed on fixed frame 5;Screw-driven 8 top of slide bar is connected with the rotate gear 30 in step-by-step toothed roller box 6, drive gear 31 and stepping in step-by-step toothed roller box 6 7 shaft of motor connects, rotate gear 30 and 31 engaged transmission of drive gear, the control system and integrated manipulator of stepper motor 7 24 communication connection, fixed frame 5 be equipped with for detect screw-driven slide bar 8 displacement LVDT displacement meters 27, LVDT displacement meters 27 communicate to connect with integrated manipulator 24;The lower part of screw-driven slide bar 8 is connect by roller bearing 10 with lever bracket 9;Two displacements The two bottom sides that sensor 12 is respectively provided at roller bearing 10 correspond to the lever bracket 9 for detecting 10 both sides of roller bearing, and displacement sensor 12 passes through Poor level controller 13 is communicated to connect with integrated manipulator 24;Suspension rod pulley seat 15 and weights 11 are located on lever bracket 9 and divide Other places are in the both sides of roller bearing 10;It is equipped on lever bracket 9 in the transmission rod pulley base between roller bearing 10 and suspension rod pulley seat 15 14, loading counterweight 21 is hung over by hanger 20 on suspension rod pulley seat 15, and the upper end of transmission rod 33 connects with transmission rod pulley base 14, It is equipped between the lower end of transmission rod 33 and load plate 19 and leads power bulb 17 and pressure sensor 18, pressure sensor 18 passes through pressure Digital display instrument 28 is communicated to connect with integrated manipulator 24;Integrated manipulator 24 is communicated to connect with computer 25.

Multiple pintle hook lock pins 16 are provided on lever bracket 9, suspension rod pulley seat 15 and transmission rod pulley base 14 pass through pintle hook lock pin 16 position with lever bracket 9.

As shown in Figure 1, top plate 4 is equipped with the first level(l)ing bubble 231, during adjusting, by observing the first level gas Whether bubble 231 is placed in the middle, to examine whether top plate 4 reaches balance.

As shown in Figure 1, top plate 4 is fixedly clamped by flat nut 22 on left column 1 and right column 2.

As shown in Figure 1, lever bracket 9 is equipped with the guide rail 26 moved convenient for transmission rod pulley base 14 and suspension rod pulley seat 15, Pintle hook lock pin 16 is nested transmission rod pulley base 14 and the conveniently moving on lever bracket 9 of suspension rod pulley seat 15 in the case of being not switched on.

As shown in figure 5, being equipped with first pulley 32 on transmission rod pulley base 14, first pulley 32 is along on lever bracket 9 Guide rail 26 moves, 14 conveniently moving of transmission rod pulley base.

As shown in fig. 6, being equipped with second pulley 321 on suspension rod pulley seat 15, second pulley 321 is along on lever bracket 9 Guide rail 26 moves, 15 conveniently moving of suspension rod pulley seat.

As shown in figs. 1 and 3, lever bracket 9 is equipped with the second level bubble 23, during adjusting, by observing the second water Whether quasi- bubble 23 is placed in the middle, to examine whether lever bracket 9 reaches balance.

As illustrated in fig. 1 and 2,19 area of load plate is adjusted, and is adapted to different moulded dimensions.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, left column 1 and right column 2 are twisted admittedly on bottom plate 3, and fixation is flat Screw 22 clamps top plate 4;4 left side of top plate sets up fixed frame 5 and 7 sliding tooth roller box 6 of stepper motor is disposed to drive screw-driven slide bar 8 The vertical displacement for driving lever bracket 9 is moved up and down, is connected between screw-driven slide bar 8 and lever bracket 9 by roller bearing 10,10 bottom of roller bearing Portion sets two pieces of displacement sensors 12 and is connected with poor level controller 13, and setting displacement difference limit value sends driver to stepper motor 7 Driving;Lever bracket 9 nested transmission rod pulley base 14 and suspension rod pulley seat 15 on the right side of roller bearing 10 are loaded, positioning lock bayonet lock is followed closely successively 16;15 times extension loading counterweights 21 of suspension rod pulley seat load, when 9 right side of lever bracket tilts down, 12 Simultaneous Monitoring of displacement sensor Data to poor level controller 13 transmits a signal to integrated manipulator 24, and control is sent by weaving limit displacement value program adjust instruction Signal processed to 7 sliding tooth roller box 6 of stepper motor drives screw-driven slide bar 8 to move down the automatic leveling for realizing loading lever bracket 9.

Top plate 4 is equipped with the first level(l)ing bubble 231, and lever bracket 9 is equipped with the second level bubble 23, and left column 1 and the right side are stood The lifting and reduction for the mobile realization lever bracket 9 that 2 top of column passes through top plate 4;9 upper edge of lever bracket is provided with guide rail 26, pintle hook lock pin The transmission rod pulley base 14 that is nested is moved with suspension rod pulley seat 15 along guide rail 26 in the case of nail 16 is not switched on;It is connect under transmission rod 33 and leads power Bulb 17 is connected with pressure sensor 18, and connect pressure digital display be connected with computer 25 realize data record in real time.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, using the self-balancing lever loading device of above-mentioned technical proposal Application method, include the following steps:

1. adjustment disposes model test groove and loading device suitable for ceiling height:

Model slot 29 is moved under device first before loading, by rotating the flat nut 22 on left column 1 and right column 2 Find best bonding position, it is contemplated that the actual conditions of model test, height-adjustable ranging from 1.5~2.0m of top plate 4, root Leveling is examined between two parties according to the first level(l)ing bubble 231, after leveling, flat nut 22 is tightened into fixed top plate 4, is adjusted in load plate 19 The heart makes the model loading zone of its Alignment model slot 29, and coarse adjustment screw-driven slide bar 8 makes lever bracket 9 horizontal, and 19 frame of load plate It is located on model slot 29;

2. calibrate step-by-step system and leveling system:

Displacement sensor 12 is opened, pressure sensor 18, LVDT displacement meters 27 and poor level controller 13 is opened, connects integrated Controller 24, the first security protection preloading block on hanger 20, fine tuning 9 left side weights 11 of lever bracket are to leading 17 down force pressure of power bulb Sensor 18 has the sensing of slight pressure value, and such as 5kPa, whether stepper motor driving leveling is normal under the conditions of examining the poor position of roller bearing 10;

3. setting lever ratio and load rank value, start to test:

Loading lever ratio is set according to magnitude of load, distributes and is loaded per level-one, by poor level controller 13, displacement sensor 12nd, LVDT displacement meters 27 and stepper motor 7 are connected to computer 25 by integrated manipulator 24, are realized and synchronized by self-programmed software Record, according to load step hierarchical loading, 10 poor position of experience roller bearing, stepping leveling process, are treated in every level-one load loading procedure Pressure, displacement measurement value stabilization are reminded and enter next stage loading, until off-test.

The embodiment of the present invention provides for the sake of example and description, and is not exhaustively or by this to send out It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing It is to more preferably illustrate the principle of the present invention and practical application to select and describe embodiment, and makes those of ordinary skill in the art It is it will be appreciated that of the invention.

Claims (10)

1. a kind of self-balancing lever loading device, it is characterised in that:Left column (1) and right column (2) are mounted on bottom plate (3) On;Top plate (4) is fixed on the left column (1) and right column (2);The bottom plate (3) is equipped with model slot (29), institute Load plate (19) is equipped in the model slot (29) stated;Fixed frame (5) is built up in the side of the top plate (4), step-by-step toothed roller box (6) and stepper motor (7) is fixed on the fixed frame (5);Screw-driven slide bar (8) top and the step-by-step toothed roller box (6) rotate gear (30) in is connected, the drive gear (31) in the step-by-step toothed roller box (6) and the stepping electricity Machine (7) shaft connects, the rotate gear (30) and drive gear (31) engaged transmission, the stepper motor (7) control system is communicated to connect with integrated manipulator (24), and the fixed frame (5) is equipped with the screw thread for detecting described It is driven the LVDT displacement meters (27) of the displacement of slide bar (8), the LVDT displacement meters (27) and the integrated manipulator (24) Communication connection;The lower part of the screw-driven slide bar (8) is connect by roller bearing (10) with lever bracket (9);Two displacement sensings The two bottom sides that device (12) is respectively provided at the roller bearing (10) correspond to the lever for detecting described roller bearing (10) both sides Frame (9), the displacement sensor (12) are communicated to connect by poor level controller (13) and the integrated manipulator (24);It hangs Bar pulley base (15), transmission rod pulley base (14) and weights (11) are located on the lever bracket (9) and the sunpender Pulley base (15), transmission rod pulley base (14) are in the side of the roller bearing (10), and the weights (11) are in institute The opposite side of roller bearing (10) stated;Loading counterweight (21) is hung over by hanger (20) on the suspension rod pulley seat (15), power transmission The upper end of bar (33) connects with the transmission rod pulley base (14), the lower end of the transmission rod (33) and the load plate (19) it is equipped between and leads power bulb (17) and pressure sensor (18), the pressure sensor (18) passes through pressure digital display instrument (28) it is communicated to connect with the integrated manipulator (24);The integrated manipulator (24) is communicated to connect with computer (25).
2. self-balancing lever loading device according to claim 1, it is characterised in that:The transmission rod pulley base (14) between the roller bearing (10) and the suspension rod pulley seat (15).
3. self-balancing lever loading device according to claim 1, it is characterised in that:The top plate (4) is by flat Flush nut (22) is fixedly clamped on the left column (1) and right column (2).
4. self-balancing lever loading device according to claim 1, it is characterised in that:It is set on the lever bracket (9) Have convenient for the mobile guide rail (26) of the transmission rod pulley base (14) and suspension rod pulley seat (15).
5. self-balancing lever loading device according to claim 4, it is characterised in that:The transmission rod pulley base (14) On first pulley (32) is installed.
6. self-balancing lever loading device according to claim 4, it is characterised in that:On the suspension rod pulley seat (15) Second pulley (321) is installed.
7. the self-balancing lever loading device according to claim 1 or 4, it is characterised in that:On the lever bracket (9) Equipped with the second level bubble (23), the top plate (4) is equipped with the first level(l)ing bubble (231).
8. self-balancing lever loading device according to claim 1, it is characterised in that:Load plate (19) area can It adjusts.
9. self-balancing lever loading device according to claim 1, it is characterised in that:It is opened on the lever bracket (9) There are multiple pintle hook lock pins (16), the suspension rod pulley seat (15) and the transmission rod pulley base (14) pass through the pintle hook lock Pin (16) is positioned with the lever bracket (9).
10. use the method for the self-balancing lever loading device described in claim 7, it is characterised in that:Include the following steps:
(1) adjustment disposes model slot and loading device suitable for ceiling height:
Model slot is moved under device first before loading, best patch is found by rotating the flat nut on left column and right column Close position, it is contemplated that the actual conditions of model test, height-adjustable ranging from 1.5~2.0m of top plate, according to the first level Bubble examines leveling between two parties, after leveling, flat nut is tightened fixed top plate, adjustment load plate center makes its Alignment model slot Model loading zone, coarse adjustment screw-driven slide bar makes lever bracket horizontal, and load plate is erected on model slot;
(2) calibrates step-by-step system and leveling system:
Displacement sensor is opened, pressure sensor, LVDT displacement meters and poor level controller is opened, connects integrated manipulator, first exist Preloading block is placed on hanger, fine tuning lever bracket side weights have slight pressure value sense to power bulb down force pressure sensor is led Should, whether stepper motor driving leveling is normal under the conditions of examining roller bearing difference position;
(3) sets lever ratio and load rank value, starts to test:
Loading lever ratio is set according to magnitude of load, distributes and is loaded per level-one, by poor level controller, displacement sensor, LVDT Displacement meter and stepper motor are connected to computer by integrated manipulator, synchronous recording are realized by self-programmed software, according to loading Step hierarchical loading, often experience roller bearing difference position, stepping leveling process in level-one load loading procedure, treat pressure, displacement measurement Stablize, remind and enter next stage loading, until off-test.
CN201610331292.6A 2016-05-17 2016-05-17 A kind of self-balancing lever loading device and its application method CN106053205B (en)

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CN109030182B (en) * 2018-09-04 2020-04-28 大连理工大学 Saturated clay sample strength and strain softening parameter measuring device based on full-flow sounding
CN110156339B (en) * 2019-05-08 2020-09-25 清华大学 Workpiece surface leveling device and method based on force sensor and lever type inclined table

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Denomination of invention: Self-balance lever-type loading device and using method thereof

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